feat(shares): add Share Withdrawal maker-checker workflow with GL settlement

Clerk submits a governed share redemption request (shares, Board Resolution
No., Meeting Date, settlement Payment Type); Bank Manager reviews with a
live backend-validated checklist (account/GL state, not just submit-time
snapshot) before approving, which redeems the shares and settles the
linked savings account in one transaction. Adds a Passbook tab to the
Share Account view, a reusable search-select control, and a Savings
Product "Map Payment Types to Specific Funds" fund-source override (only
Loan Products had this before) so settlement can be GL-mapped correctly.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/app/cashier/transaction-entry/transaction-entry.component.scss

@@ -961,6 +961,14 @@ input.ws-amt-input--locked {
   flex-shrink: 0;
 }
 
+.ws-f__hint {
+  display: block;
+  margin-top: 2px;
+  font-size: 10px;
+  color: $ws-muted;
+  font-weight: 500;
+}
+
 .ws-amt-input {
   flex: 1;
   height: 100%;